Plytanium® plywood sheathing is a construction-grade, Exposure 1 Durability Panel, made from real southern pine plywood. Blue Ribbon® oriented strand board (OSB) Rated Sheathing is an engineered wodd structural panel, made of compressed wood strands arranged in three perpendicular layers and bonded with phenolic resin. Nautilus™ Wall Sheathing combines OSB structural sheathing and building wrap into a sheathing solution that offers rain and moisture protection during the entire building cycle. DensGlass Gold exterior sheathing's advantage is a moisture-resistant core and enhanced fiberglass mats, as opposed to paper facings, which resist the effects of moisture exposure during and after construction.